Karen Karp is a professor in the EdD program at the Johns Hopkins School of Education. For 21 years prior to this appointment, she was a professor of mathematics education in the Department of Early and Elementary Childhood Education at the University of Louisville. She is the 2020 recipient of the NCTM Lifetime Achievement Award. She is the author or co-author of 22 book chapters, approximately 45 articles and more than 26 books, including Elementary and Middle School Mathematics: Teaching Developmentally, Student Centered Mathematics; Developing Essential Understanding of Addition and Subtraction for Teaching Mathematics; and Inspiring Girls to Think Mathematically. She is a former member of the board of directors of the National Council of Teachers of Mathematics (NCTM) and a former president of the Association of Mathematics Teacher Educators. While on the NCTM board, she was co-principal investigator on a grant funded by the National Science Foundation to bring together teams of mathematics and special educators to develop research supporting the teaching of mathematics to students with disabilities. She continues to work in classrooms across the country to support teachers of students with disabilities in their mathematics instruction.